The reduction of carbon dioxide emissions, introduced by the European Union, opened the possibility of conducting experimental works on a new generation of materials—ecological and environmentally friendly ones. Such materials include those which combine raw natural resources with waste subject to disposal. The objective of the performed investigations was an assessment of the influence of fly ashes on selected parameters of building materials. The paper proposes a method of the enrichment of clay with fly ash, which would lead to the neutralization of heavy metals in the burnt matrix, possible oxidation of organic substances present in the ashes, or the destruction of pathogens, as well as an increase of the resistance of the clay ceramics to low temperatures. Clay samples were prepared with the addition of the fly ash from three sewage treatment plants. The experiments encompassed investigations of physical and chemical properties of the fly ash, as well as bending strength tests of the beam-shaped samples heated at temperatures of 20, 300, 500, and 700 °C. The beam halves, resulting from the destruction of the samples during these tests, served for testing the compressive strength. The collected results allowed a comparison of the properties of the samples. The obtained test results confirm the possibility of manufacturing a product modified with the fly ash from the thermal treatment of sewage sludge. The obtained compressive strength of the samples amounted 0.3–2.6 MPa.

Steel structures are subject to large dynamic loads clearly reflected by generated vibration processes. The vibrations may affect state of serviceability of structures by lowering comfort of persons working there as well as possible reaching the level hazardous to safety of the structures. The effect of vibrations to structure is mainly manifested by additional stresses in a given cross-section, which are summed up with those resulting from static loads. The dynamic loads may cause damaging effects in buildings of various structural types or even lead to their destruction. Judging the necessity of improving the quality assessment methods of building structures for purposes of estimation of their state as well as safety factors for lattice structures, the author of this work undertook an attempt to investigate destruction process of selected object by using the modal analysis method.

W pracy wskazano zakres możliwych zastosowań badania miar rozpływu energii drganiowej wykorzystywanych w modelowaniu procesów drganiowych i analizie modalnej w obszarze metodologii badań i metodyk szczegółowych nauk technicznych. Analizy teoretyczne i weryfikacja praktyczna badania wieluróżnych materiałów i budowli wskazują na szerokie możliwości zastosowań opisanych dokonań. Uznając potrzebę doskonalenia metod oceny stanu degradacji konstrukcji budowlanych, w pracy przedstawionouogólnione, istotne wyniki postępowania badawczego w zakresie weryfikacji skuteczności opracowanych metodyk szczegółowych zastosowania miar drganiowych w badaniach symulacyjnych, stanowiskowych i eksploatacyjnych.